KeepFlash vs Brainstream

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

KeepFlash compared with Brainstream
Detail	KeepFlash	Brainstream
What it does	AI knowledge library for saved research	AI-powered note-taking app that captures thoughts, finds connections, and enables action through natural conversation
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Freemium
Pricing	Free: $0 with 150 notes, 2 spaces, 500MB storage. Plus: $6.58/month (billed yearly) with unlimited notes, 10 spaces, 10GB storage. Pro: $12.42/month (billed yearly) with unlimited spaces, 50GB storage.	Free: 50 AI actions per month, 50 notes total, 5MB attachments. Pro: 500 AI actions per month, unlimited notes, 20MB attachments, Google Calendar integration, priority support. Available through app store subscription (iOS/Android), monthly or annual billing.
Key features	Save webpages, PDFs, YouTube videos, files, and notes Full-text search across saved content Semantic search by meaning PDF annotations and highlighting AI-assisted tagging Topic Pages from related notes Ask questions with source citations Browser extension for one-click saving Block editor for notes Agent access via MCP protocol	Brain Chat AI assistant with two modes: Search Notes and Just Chat Voice transcription using OpenAI Whisper Semantic search that finds relevant notes by meaning AI Actions to create tasks and manage notes with natural language commands Daily and Weekly Briefs with AI-generated summaries Rich text editor with formatting and attachments Undo button for all AI actions Note summaries, rewrites, task extraction, and tag suggestions
What makes it different	Source-linked answers with citations to original materials Keeps content and source together for retrieval Searchable by meaning, not just titles Automatic organization of related ideas into Topic Pages Integrates with AI agents for grounded answers	AI understands meaning with semantic search, finding relevant notes even with different wording All AI actions are immediately undoable with one tap Free access to core features including voice transcription and embeddings Data privacy: notes not used to train AI models Natural language task creation through conversational AI
Community votes	0	0
DR (Domain Rating by Ahrefs)	2 no change since last check	6 no change since last check
Trust Flow (Majestic)	5	2
Citation Flow (Majestic)	23	24
Referring domains (Majestic)	25	24

5 details filled in for both companies.

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